Combination Meters

COMBINATION METERS

System Description

UNIFIED METER CONTROL UNIT
- Speedometer, odo/trip meter, tachometer, fuel gauge and water temperature gauge are controlled by the unified meter control unit, which is built into the combination meter. Unified meter control unit receives signals from unified meter and A/C amp.
- Warning lamps and indicator lamps are controlled by signals drawn from the unified meter and A/C amp., BCM (body control module), and components connected directly to the combination meter.
- Digital meter is adopted for odo/trip meter.*
*The record of the odometer is kept even if the battery cable is disconnected. The record of the trip meter is erased when the battery cable is disconnected.
- Odo/trip meter and A/T indicator segments can be checked in diagnosis mode.
- Meters/gauges can be checked in diagnosis mode.

Illumination control
The unified meter control unit outputs the odo/trip meter and A/T indicator lighting when the ignition switch is turned ON. When the lighting switch is turned on, the illumination control switch can be used to adjust the brightness of the combination meter illumination and the odo/trip meter illumination. When the ignition switch is in the START position, the combination meter dial lighting and illumination control switch lighting are turned off. For additional combination meter illumination control information, refer to "System Description".

UNIFIED METER AND A/C AMP.
For unified meter and A/C amp. system description information, refer to "System Description".




HOW TO CHANGE THE DISPLAY FOR ODO/TRIP METER
- The vehicle speed signal and the memory signals from the meter memory circuit are processed by the combination meter and the mileage is displayed.
- Depressing the odo/trip meter switch toggles the mode in the order shown in the figure.




- The odo/trip meter display mode toggling and trip display resetting can be identified by the amount of time that elapses from pressing the odo/trip meter switch to releasing it.
- When resetting with trip A displayed, only trip A display is reset. (Trip B operates the same way.)

POWER SUPPLY AND GROUND CIRCUIT

Power is supplied at all times
- through 10 A fuse [No.19, located in the fuse block (J/B)]
- to combination meter terminal 24, and
- to unified meter and A/C amp. terminal 21.

With the ignition switch in the ON or START position, power is supplied
- through 10 A fuse [No.14, located in the fuse block (J/B)]
- to combination meter terminal 23, and
- through 10 A fuse [No.12, located in the fuse block (J/B)]
- to unified meter and A/C amp. terminal 22.

With the ignition switch in the ON position, power is supplied
- through 15 A fuse [No.10, located in the fuse block (J/B)], and
- through 15 A fuse [No.11, located in the fuse block (J/B)]
- to unified meter and A/C amp. terminal 46.

Ground is supplied
- to combination meter terminals 10, 11 and 12, and l to unified meter and A/C amp. terminals 29 and 30
- through body grounds M57, M61 and M79.

WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.
ECM provides a water temperature signal to unified meter and A/C amp. via CAN communication lines. Unified meter and A/C amp. provides a water temperature signal to combination meter for water temperature gauge via communication line between unified meter and A/C amp. and combination meter.

TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).
ECM provides an engine speed signal to unified meter and A/C amp. via CAN communication lines. Unified meter and A/C amp. provides an engine speed signal to combination meter for tachometer via communication lines between unified meter and A/C amp. and combination meter.

FUEL GAUGE
The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by a variable ground signal supplied
- from unified meter and A/C amp. terminal 36
- through the fuel level sensor unit and fuel pump terminal 5
- to unified meter and A/C amp. terminal 28 for the fuel gauge.

Unified meter and A/C amp. provides a fuel level signal to combination meter for fuel gauge via communication line between unified meter and A/C amp. and combination meter.

SPEEDOMETER
ABS actuator and electric unit (control unit) provides a vehicle speed signal to the unified meter and A/C amp. via CAN communication lines. After unified meter and A/C amp. receives the vehicle speed signal, it changes the signal to 8 pulse signal and provides the 8 pulse signal to the combination meter for the speedometer via communication line.